https://buuoj.cn/challenges#[ACTF%E6%96%B0%E7%94%9F%E8%B5%9B2020]easyre

https://files.buuoj.cn/files/ee7f29503c7140ae31d8aafc1a7ba03f/attachment.tar

信息:     文件名: H:/第七届“强网杯”全国网络安全挑战赛/BUUCTF/[ACTF新生赛2020]easyre/easyre.exe    大小: 21467(20.96 KiB)    操作系统: Windows(95)    架构: I386    模式: 32 位    类型: 控制台    字节序: LE

mov     byte ptr [esp+12h], 2Ah ; '*'mov     byte ptr [esp+13h], 46h ; 'F'mov     byte ptr [esp+14h], 27h ; '''mov     byte ptr [esp+15h], 22h ; '"'mov     byte ptr [esp+16h], 4Eh ; 'N'mov     byte ptr [esp+17h], 2Ch ; ','mov     byte ptr [esp+18h], 22h ; '"'mov     byte ptr [esp+19h], 28h ; '('mov     byte ptr [esp+1Ah], 49h ; 'I'mov     byte ptr [esp+1Bh], 3Fh ; '?'mov     byte ptr [esp+1Ch], 2Bh ; '+'mov     byte ptr [esp+1Dh], 40h ; '@'

int __cdecl main(int argc, const char **argv, const char **envp){  _BYTE v4[12]; // [esp+12h] [ebp-2Eh] BYREF  _DWORD v5[3]; // [esp+1Eh] [ebp-22h]  _BYTE v6[5]; // [esp+2Ah] [ebp-16h] BYREF  int v7; // [esp+2Fh] [ebp-11h]  int v8; // [esp+33h] [ebp-Dh]  int v9; // [esp+37h] [ebp-9h]  char v10; // [esp+3Bh] [ebp-5h]  int i; // [esp+3Ch] [ebp-4h]
  __main();  qmemcpy(v4, "*F'\"N,\"(I?+@", sizeof(v4));  printf("Please input:");  scanf("%s", v6);  if ( v6[0] != 'A' || v6[1] != 'C' || v6[2] != 'T' || v6[3] != 'F' || v6[4] != '{' || v10 != '}' )    return 0;  v5[0] = v7;  v5[1] = v8;  v5[2] = v9;  for ( i = 0; i <= 11; ++i )  {    if ( v4[i] != _data_start__[*(v5 + i) - 1] )      return 0;  }  printf("You are correct!");  return 0;}

*F'"N,"(I?+@

~}|{zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$# !"

__data_start__ = "~}|{zyxwvutsrqponmlkjihgfedcba`_^]\\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210/.-,+*)('&%$# !\""
v4 = [42,70,39,34,78,44,34,40,73,63,43,64]
flag = ''
for i in v4:    flag += chr(__data_start__.find(chr(i)) + 1)
print(flag)

flag{U9X_1S_W6@T?}